BU46K452G-TL

Overview

The BU46K452G-TL is a voltage detector IC from ROHM Semiconductor's BU46 series, designed for monitoring single-input power supplies. It features a CMOS output type and operates within a supply voltage range of 0.6 V to 6 V. The device has a typical threshold voltage of 4.5 V with an accuracy of ±1%. It includes a built-in counter timer delay circuit that provides a fixed reset delay time of 200 ms, eliminating the need for external capacitors. The component supports manual reset functionality and lacks a watchdog timer or battery backup switch. It is housed in an SSOP-3 package and operates at a working supply current of 2.8 µA.

Feature Summary

• Built-in counter timer delay circuit eliminates the need for external delay-setting capacitors
• Highly accurate voltage detection with ±1% precision for reliable system supervision
• Low current consumption design suitable for battery-powered applications
• CMOS output configuration compatible with standard digital logic interfaces

Applications

• Monitoring microprocessor power supply voltages
• Supervising battery-operated electronic devices
• Ensuring stable operation in portable consumer electronics
• Providing reset signals for embedded systems during power fluctuations

Procurement Notes

Verify the exact ordering part number and suffixes against official ROHM documentation before procurement. Confirm availability status as components may be discontinued or not recommended for new designs. Check RoHS compliance details and moisture sensitivity levels. Ensure the supplier provides valid traceability and authenticity guarantees. Cross-reference datasheet revisions to confirm parameter consistency.

Selection Notes

Select this component when a fixed 200 ms delay and CMOS output are required for a 4.5 V threshold application. Consider the BU46 series characteristics for low-power supervision needs. Evaluate the SSOP-3 package constraints for PCB layout. Compare against other series members if different delay times or output types are needed. Verify operating temperature ranges match the target environment specifications.

Part Context

This part belongs to the BU45/BU46 series of voltage detectors from ROHM Semiconductor. These ICs are characterized by high accuracy and low current consumption. The series offers various threshold voltages and delay options. The BU46 variant specifically utilizes CMOS outputs. This family is intended for supervisory circuits in compact electronic designs requiring precise voltage monitoring without complex external timing components.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source data. Consult official ROHM resources for potential replacements.